81926936 has 64 divisors (see below), whose sum is σ = 199046400. Its totient is φ = 30699648.

The previous prime is 81926891. The next prime is 81926947. The reversal of 81926936 is 63962918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10871 + ... + 16793.

It is an arithmetic number, because the mean of its divisors is an integer number (3110100).

Almost surely, 2^81926936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81926936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99523200).

81926936 is an abundant number, since it is smaller than the sum of its proper divisors (117119464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81926936 is a wasteful number, since it uses less digits than its factorization.

81926936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968 (or 5964 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 81926936 is about 9051.3499545648. The cubic root of 81926936 is about 434.3190756013.

The spelling of 81926936 in words is "eighty-one million, nine hundred twenty-six thousand, nine hundred thirty-six".